It depends on your body. Not everyone is the same. Some can close in mminutes and others in days. The age of the piercing doesnt always help determine how long it will stay open. I'd just wear a clear retainer in it to make it less noticeable.
It varies as to what cartilige piercing you want and where you want to go for it
It all depends on your pain tolerance. Some people may say it hurts and others may not
The eardrum of frogs is surrounds by a cartilige ring .
not usually, but it depends on the person.
1 year after having it done, you can take the jewellery out for an 8 hour period without fear of the piercing closing up.
Yes.
You have to remove the jewelry and clean it, including the piercing.
Depends on your body, how old the piercing is, and what size the piercing is.
It depends on how long it's been in the tongue but also is different from person to person how fast it closes, but I Recomend You Buy A Retainer For Your Piercing Seeing As They Are See Through.
Your ears and your nose
thyroid
It's actually much less painful with a needle, and there's a lower chance of infection. The piercing gun can't be cleaned and sterilized properly, whereas the piercing needle is always new and just our of a sterile package. The piercing gun can shatter catilage in some cases, the earring can get stuck in the gun causing trauma to the area when it is yanked out, and the ear-ring causes a bigger hole than the needle.